When can I plant Napa cabbage in Zone 3a

Before planting it is a good idea to find our USDA Zone info to estimate our garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

You can determine when you can plant napa cabbage in Zone 3a by using the USDA zone info.


Planting Calendar for Napa cabbage

Frost tolerance for napa cabbage: Very tolerant of frost.
When you should plant them: Up to 7 weeks before last frost.

Napa cabbage are very cold tolerant which means that you can start planting them much earlier than other frost tender plants.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant napa cabbage
Possibly ok, but a risky time to plant napa cabbage
Probably not a good time to plant napa cabbage

The earliest that you can plant napa cabbage in Zone 3a is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant napa cabbage and expect a good harvest is probably August. Any later than that and your napa cabbage may not have a chance to fully mature. If you are starting your napa cabbage indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost has passed is on May 15 in Zone 3a. We can expect an average low temperature of -40°F in the coldest months of winter.

Remember that our actual date of last frost is not always accurate because it is based on the USDA zone info for Zone 3a and it can change quite a bit from year to year. Since half of the time in Zone 3a we get surprised by a frost after May 15 be ready to protect your napa cabbage if we have a surprise late frost.

USDA Zone Info for Zone 3a

Here is the info for USDA Zone 3a.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-40°F
Highest Expected Low-35°F

This means that on a really cold year, the coldest it will get is -40°F. On most years you should be prepared to experience lows near -35°F.

Plants to Grow in Zone 3a

You may be interested in our other planting guides for Zone 3a.